<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch" label-width="68px">
      <el-form-item label="商家名称" prop="merchantName">
        <el-input
          v-model="queryParams.merchantName"
          placeholder="请输入商家名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['ruoyi-activity:merchant:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="success"
          plain
          icon="el-icon-edit"
          size="mini"
          :disabled="single"
          @click="handleUpdate"
          v-hasPermi="['ruoyi-activity:merchant:edit']"
        >修改</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="danger"
          plain
          icon="el-icon-delete"
          size="mini"
          :disabled="multiple"
          @click="handleDelete"
          v-hasPermi="['ruoyi-activity:merchant:remove']"
        >删除</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="warning"
          plain
          icon="el-icon-download"
          size="mini"
          @click="handleExport"
          v-hasPermi="['ruoyi-activity:merchant:export']"
        >导出</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table v-loading="loading" :data="merchantList" @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="55" align="center" />
      <el-table-column label="id" align="center" prop="id" />
      <el-table-column label="商家名称" align="center" prop="merchantName" />
      <el-table-column label="商家二维码url" align="center" prop="merchantCodeUrl" />

      <!-- 新增一列：二维码 -->
      <el-table-column label="二维码" align="center" width="150">
        <template slot-scope="scope">
          <div v-if="scope.row.qrCodeUrl" class="qr-code-container">
            <img :src="scope.row.qrCodeUrl" alt="二维码" style="width: 100px; height: 100px;" />
          </div>
          <div v-else>生成中...</div>
        </template>
      </el-table-column>

      <el-table-column align="center">
        <template slot="header">
          总数: {{ totalCancelNumber }}
        </template>
        <template slot-scope="scope">
          已核销：
          {{ scope.row.cancelNumber }}
        </template>
      </el-table-column>

      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['ruoyi-activity:merchant:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['ruoyi-activity:merchant:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <pagination
      v-show="total>0"
      :total="total"
      :page.sync="queryParams.pageNum"
      :limit.sync="queryParams.pageSize"
      @pagination="getList"
    />

    <!-- 添加或修改商家对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="500px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-form-item label="商家名称" prop="merchantName">
          <el-input v-model="form.merchantName" placeholder="请输入商家名称" @input="generateQrCode"/>
        </el-form-item>
<!--
        <el-form-item label="商家二维码url" prop="merchantCodeUrl">
          <el-input v-model="form.merchantCodeUrl" placeholder="请输入商家二维码url"  />
        </el-form-item>
-->

        <!-- 二维码预览 -->
<!--
        <el-form-item label="二维码">
          <div class="qr-code-preview" style="text-align: center;">
            <img :src="qrCodeUrl" alt="二维码" v-if="qrCodeUrl" style="width: 150px; height: 150px;" />
            <p v-else>请输入二维码URL</p>
          </div>
        </el-form-item>
-->
      </el-form>

      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listMerchant, getMerchant, delMerchant, addMerchant, updateMerchant, generateQrCode } from "@/api/ruoyi-activity/merchant"
export default {
  name: "Merchant",
  data() {
    return {
      // 遮罩层
      loading: true,
      // 选中数组
      ids: [],
      // 非单个禁用
      single: true,
      // 非多个禁用
      multiple: true,
      // 显示搜索条件
      showSearch: true,
      // 总条数
      total: 0,
      // 商家表格数据
      merchantList: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 查询参数
      queryParams: {
        pageNum: 1,
        pageSize: 10,
        merchantName: null,
        merchantCodeUrl: null,
      },
      // 表单参数
      form: {},
      qrCodeUrl: null, // 用于弹窗中显示二维码图片
      // 表单校验
      rules: {
        merchantName: [
          { required: true, message: "商家名称不能为空", trigger: "blur" }
        ],
        merchantCodeUrl: [
          { required: true, message: "商家二维码URL不能为空", trigger: "blur" }
        ]
      }
    }
  },
  computed: {
    totalCancelNumber() {
      return this.merchantList.reduce((sum, item) => sum + (item.cancelNumber || 0), 0);
    }
  },
  created() {
    this.getList()
  },
  methods: {

    async generateQrCode() {
      this.form.merchantCodeUrl = "https://800.xichengnet.cn/shoper";
      const merchant = {
        merchantCodeUrl: this.form.merchantCodeUrl,
        id: this.form.id || ''
      };

      await generateQrCode(merchant); // 调用外部的 generateQrCode 方法
      this.qrCodeUrl = merchant.qrCodeUrl;
    },

    /** 查询商家列表 */
    getList() {
      this.loading = true
      listMerchant(this.queryParams).then(response => {
        this.merchantList = response.rows
        this.total = response.total
        this.loading = false
      })
    },
    // 取消按钮
    cancel() {
      this.open = false
      this.reset()
    },
    // 表单重置
    reset() {
      this.form = {
        id: null,
        merchantName: null,
        merchantCodeUrl: null,
        createTime: null,
        updateTime: null
      }
      this.resetForm("form")
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.queryParams.pageNum = 1
      this.getList()
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm")
      this.handleQuery()
    },
    // 多选框选中数据
    handleSelectionChange(selection) {
      this.ids = selection.map(item => item.id)
      this.single = selection.length!==1
      this.multiple = !selection.length
    },
    /** 新增按钮操作 */
    handleAdd() {
      this.reset()
      this.open = true
      this.title = "添加商家"
    },
    /**
     * 在弹窗中根据当前输入生成二维码
     */
    async generateDialogQrCode() {
      const merchant = {
        merchantCodeUrl: this.form.merchantCodeUrl,
        id: this.form.id || ''
      };

      await generateQrCode(merchant);

      this.qrCodeUrl = merchant.qrCodeUrl;
    },



    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset()
      const id = row.id || this.ids
      getMerchant(id).then(response => {
        this.form = response.data
        this.open = true
        this.title = "修改商家"
        this.generateQrCode() // 手动触发二维码生成
      })
    },

    // 输入框变化时触发二维码更新
    onInputMerchantCodeUrl() {
      this.generateDialogQrCode()
    },
    /** 提交按钮 */
    submitForm() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.id != null) {
            updateMerchant(this.form).then(response => {
              this.$modal.msgSuccess("修改成功")
              this.open = false
              this.getList()
            })
          } else {
            addMerchant(this.form).then(response => {
              this.$modal.msgSuccess("新增成功")
              this.open = false
              this.getList()
            })
          }
        }
      })
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      const ids = row.id || this.ids
      this.$modal.confirm('是否确认删除商家编号为"' + ids + '"的数据项？').then(function() {
        return delMerchant(ids)
      }).then(() => {
        this.getList()
        this.$modal.msgSuccess("删除成功")
      }).catch(() => {})
    },
    /** 导出按钮操作 */
    handleExport() {
      this.download('ruoyi-activity/merchant/export', {
        ...this.queryParams
      }, `merchant_${new Date().getTime()}.xlsx`)
    }
  }
}
</script>
